swain



Patented Nov. 30,1880.

N. PVERS. FHOTO-UTNDGRAFHER. WASHINGYON, D (L D. M. SWAI-N. Boiler for Portable Engines. No. 235,041'

lUNiTnn STATES PATENT Ormea.

DAVID M. SWAIN, OF STILLVATER, MINNESOTA, ASSIGNOR OF TVO-THIRDS TO SEYMOUR, SABIN &; OO., OF SAME PLACE.

BOILER FOR PORTABLE ENGINES.

SPECIFICATION forming part of Letters Patent No. 235,041, dated November 30, 1880.

Application filed October 5. 1880.

To all whom t may concern:

Be it known that I, DAVID M. SWAIN, a citizen of the United States of America, residing at Stillwater, in the county ot' Washington and State of Minnesota, have invented certain new and useful Improvements in Boilers for Portable Engines; and I do hereby declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to the accompanying drawings, and to letters or iigures of reference marked thereon, which form a part ot' this specification.

Figure l is a longitudinal vertical section of my improved boiler for portable engines, showing also the section of a furnace and some of the parts of an engine. Fig. 2 is a longitudinal vertical section of my improved feed-water heater attached to the boiler.

One part. ot' the invention relates to the combination, with the boiler, of a pivotal support therefor constructed as a chamber for the withdrawal ot' sediment.

Another part of the invention relates to the combination, with the boiler and the chamber adapted to receive sediment therefrom, of peculiarly-constructed devices arranged as a pivotal bearing for the front end of the boiler.

Another part of the invention relates to the combination, with the boiler, the exhaust mechanism, and thesmoke-stack, ot' devices arranged to feed hot water to the boiler and to prevent water from passing to the smoke-stack with the exhaust-steam.

In the drawings, A represents the boiler, supported 'above a furnace consisting of a lirebox, A', and lire-nues G, communicating with the return-fines H H by means of a returningchamber at the front end of the boiler.

The outer wall of the lower part of the boiler surrounds the tire-box and lire-dues, so that the water shall be in contact therewith, not only at the .upper side, but also at the rear of the box, as shown at A2, and beneath the firetlues. p

In order to withdraw from the water in the boiler any sediment that may be held thereby, I combine with the boiler a collecting-cham- (No model.)

ber, situated beneath the {ire-flue G, said cham- 5o ber providing a room or compartment for the water where there is but little agitation, so that the sediment can be deposited while the water is in a state of comparative rest. This collectiug-chamberis represented by S, and in the drawings is shown as heilig formed separatelyi'rom the boiler, and attached thereto beneath an orifice, s', in the bottom ot' the boiler.

In order to readily withdraw the sediment 6o from the chamber, I combine with it a removable bottom piece, S. preferably united to the wall ot the chamber by a screw-thread connection.

Vhen the boiler is mounted for transportation, thei'orward end is supported upon a truckframe by means ot' the chamber S, which is constructed to operate as a pivotal support, and is therefore preferably made tubular in form. It is secured firmly in vertical position 7o by means of one or more braces, T.

The removable base-piece S is formed with a strong ball-pivot, s, to provide a suitable bearing for the boiler and engine.

N represents a box or chamber, ot' a length 75 nearly equal to that of the engine, and attached to the boiler immediately below the steam-chest. Within this box the feedwater is heated before entering the boiler. 1

Heretofore use has been made of feed-water 8o heaters divided longitudinally and situated with the longer axis in a vertical position. I, however, in order to prevent the water of condensation from passing to the smoke-stack with the exhaust-steam, and in order, also, to subject the water as long as possible to the heating action ot' the steam, have devisedy the improved construction and arrangement of feedwater heater shown in the drawings. It is arranged to have its longer axis situated in a 9o horizontal position, so that feed-pipes of a length nearly equal to that of the boiler may be used. l

N is a horizontal partition dividing the heating-chamber into twol apartments, communicating with each other by means of a narrow throat, 1t.

The water passes back and forth through v above the bottom of the lower apartment, and

thus only the dry steam is carried to the stack. The Water of condensation is collected in the lower apartment and conducted to a suitable orifice, Q, Where it can be Withdrawn from the heater. I prefer to use the water thus withdrawn for the purpose of quenching the ashes in the receptacle beneath the tire-boX. and conduct it to that point by means of a pipe, R.

By arranging the feed- Water heater as described, With the supplyport a and the exhaust-pipe O situated in the closest proximity possible to the steam-chest and the smokestaclr, I am enabled to utilize much more of the heat of the exhaust-steam, and to discharge it drier and more directly into the stack than by the ordinary arrangement. Moreover, the

arrangement shown and described gives a compactness of parts very desirable in portable engines. p

I do not herein claim the improvements which I have shown in relation to the boilerfurnace, as I prefer to make them the subjectmatter of another application which I have filed.

What I claim is- 1. In a portable engine, the combination, with the boiler, of a sediment-chamber situated beneath the boiler and constructed and arranged substantially as set forth, to withdraw sediment and impurities from the Water in the boiler.,

2. In a portable engine, the combination, with the boiler, of the tubular chamber S, communicating therewith at its front end, and arranged, substantially as described, as a pivotal support therefor.

3. In a portable engine, the combination, with the boiler and the chamber S, of the removable -screw-threaded base-piece S', having the pivotal projection s, as set forth.

4. In a portable engine, the combination, with a horizontal boiler, a smoke-stack at the rear end ofthe boiler, and the steam-cylinder situated close to the smoke-stack, of the eX- tended heating-box N, situated horizontally, and provided with the longitudinal partition N', and With the watenoritice Q, and the eX- haustpipe O, communicating with box N ata point above the bottom, as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

DAVID M. SWAIN.

Witnesses:

WAYLAND S. GooDHUE, LEVI G. PRooToR. 

